Table of colors for different ranks.

[Pokinope]

Hello, trying to make it so different ranks have different colors like this below:
local staffcolors = RankColors[ LocalPlayer():GetUserGroup() ]

RankColors = {}
RankColors["superadmin"] = Color( 255, 255, 255 )
RankColors["manager"] = Color( 255, 0, 0 )

chat.AddText( staffcolors, LocalPlayer():GetUserGroup() )
But this gives the error below:
[ERROR] addons/staffchat/lua/staffchat/cl.lua:8: attempt to index global 'RankColors' (a nil value)
  1. func - addons/staffchat/lua/staffchat/cl.lua:8
   2. unknown - lua/includes/extensions/net.lua:32

I am not sure as to why it is giving this error, any help would be nice!

[jwgamesuk]

you're running the lookup on the table before you've defined the table

[Pokinope]

Ay, yep
Me being a dummy again...

Thanks man!